Reports until 17:57, Wednesday 06 March 2013
H1 IOO
deepakmanoj.nandakumar@LIGO.ORG - posted 17:57, Wednesday 06 March 2013 - last comment - 10:03, Thursday 07 March 2013(5693)
Realignment of MC Mirrors

Guido M, Joe G, Deepak K


We restored the IMC mirror positions inside their suspension systems based on the Pitch and Yaw OSEM readings to their best lock values (02/10/13 22:20:00). The Pitch/Yaw readings and the Alignment Offsets of the three mirrors are:

MC1:
Alignment Offsets - 
                                  Pitch : 355 ct (665.661 urad)
                                  Yaw  : 497 ct (1332.258 urad)
Mirror OSEM Value - 
                                  Pitch : -2615 urad
                                  Yaw  : 46 urad
                                   Length : 80 um

 

MC2:
Alignment Offsets - 
                                  Pitch : 65 ct (121.9 urad)
                                  Yaw  : 137 ct (367.8 urad)
Mirror OSEM Value - 
                                  Pitch : -21 urad
                                  Yaw  : 137 urad
                                   Length : 5 um

MC3:
Alignment Offsets - 
                                  Pitch : 543 ct (1018.2 urad)
                                  Yaw  : 170 ct (455.7 urad)
Mirror OSEM Value - 
                                  Pitch : -855 urad
                                  Yaw  : -376 urad
                                   Length : 66 um

 
Comments related to this report
jeffrey.kissel@LIGO.ORG - 10:03, Thursday 07 March 2013 (5699)
Link 

I've updated the h1susmc*_safe.snap files this morning with these numbers. In addition, Arnaud noticed yesterday that the MC1 M1 (top stage) open light current compensation OFFSETs and GAINs in the OSEMINF banks were actually the *old* assembly area values instead of the values taken with production electronics from LHO aLOG 4067. I've updated the compensation to use the production electronics numbers, so this is captured in the  h1susmc1_safe.snap as well.

All three .snaps have been committed to the userapps repository.